Ressurect move.cpp

Actually it is san.cpp renamed. Because now has the move
conversions functions and doesn't have any more the bulky
move_from_san(), it is better to call it move.cpp

Remove san.h while there.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

src/Makefile

@@ -32,8 +32,8 @@ PGOBENCH = ./$(EXE) bench 32 1 10 default depth
 
 ### Object files
 OBJS = bitboard.o pawns.o material.o endgame.o evaluate.o main.o \
-	misc.o movegen.o history.o movepick.o search.o position.o \
-	tt.o uci.o ucioption.o book.o bitbase.o san.o benchmark.o timeman.o
+	misc.o move.o movegen.o history.o movepick.o search.o position.o \
+	tt.o uci.o ucioption.o book.o bitbase.o benchmark.o timeman.o
 
 
 ### ==========================================================================